返回子表

Question

我有下表：

|object|attribute1|attribute2|
|A     |true      |10        |
|B     |false     |15        |

我希望有一个返回的查询：

|key      |value    |
|Name_A_1 |true     |
|Name_A_2 |10       |
|Name_B_1 |false    |
|Name_B_2 |15       |

基本上我想将对象的名称转换两次并将其附加到每个属性。

修改

正如Tim Biegeleisen所说，我在这里有类型问题。所以我愿意将所有类型转换为字符串。

Answer 1

我会使用apply执行此操作：

select ky, val
from t cross apply
     (values ('Name_' + object + '_1', attribute1),
             ('Name_' + object + '_2', cast(attribute1 as varchar(255)))
     ) v(ky, val);

Answer 2

 SELECT 'Name_' + object + '_1' as key
        attribute1 as value 
 FROM YourTable
 UNION ALL
 SELECT 'Name_' + object + '_2' as key
        attribute2 as value 
 FROM YourTable

Answer 3

未经测试，希望这有效......

SELECT 'Name_' + object + '_' + (CAST(row_number() OVER (ORDER BY attribute1, attribute2)) AS VARCHAR(6)) AS row,
   attribute1, 
   attribute2 
FROM tableName